In Mahavansa

Mahavansa/Chapter 10 writes ...Pandukabhaya (437-367 BC) laid out four suburbs as well as the Abhaya-tank, the common cemetery, the place of execution, and the chapel of the Queens of the West, the banyan-tree of Vessavana and the Palmyra-palm of the Demon of Maladies, the ground set apart for the Yonas and the house of the Great Sacrifice; all these he laid out near the west gate.

Mahavansa/Chapter 12 tells: Moggaliputta after the third Buddhist council for founding of the religion in adjacent countries, sent forth theras....He sent to Aparantaka the Yona named Dhammarakkhita. The thera Dhammarakkhita the Yona, being gone to Aparantaka' and having preached in the midst of the people the Aggikkhandhopama-sutta gave to drink of the nectar of truth to thirty-seven thousand living beings who had come together there, he who perfectly understood truth and untruth. A thousand men and yet more women went forth from noble families and received the pabbajja. ....The wise Maharakkhita who went to the country of the Yona delivered in the midst of the people the Kalakarama suttanta. A hundred and seventy thousand living beings attained, to the reward of the path (of salvation); ten thousand received the pabbajja.

Mahavansa/Chapter 29 tells.... From various (foreign) countries also did many bhikkhus come hither; what need to speak of the coming of the brotherhood living here upon the island (Lanka)?

From Alasanda the city of the Yonas came the thera Yonamahadhammarakkhita with thirty thousand bhikkhus to the island of Lanka at the time of building of Great Thüpa.

The great thera Suriyagutta came from the great Kelasa-vihara with ninety-six thousand bhikkhus.

Alexander Cunningham[5] has identified Alasanda and Kelasa with mentioned in above paragraph. .... He writes that The passage of Pliny describing the position of Alexandria is prefaced by a few words regarding the town of Cartana, which, while they assign it a similar position at the foot of the Caucasus, seem also to refer it to the immediate vicinity of Alexander's city. .....If I am right in identifying Begram with the Kiu-lu-sa-pang of the Chinese pilgrim, the true name of the place must have been Karsana, as written by Ptolemy, and not Cartana, as noted by Pliny. The same form of the name is also found on a rare coin of Eukratides, with the legend Karisiye nagara, or " city of Karisi" which I have identified with the Kalasi of the Buddhist chronicles, as the birthplace of Raja Milindu. In another passage of the same chronicle, [6]Milindu is said to have been born at Alasanda, or Alexandria, the capital of the Yona, or Greek country. Kalasi must therefore have been either Alexandria itself or some place close to it.

In Afghanistan

H. W. Bellew writes that Muhammadan name appears among the sections of many of the Afghan' tribes, especially in those inhabiting the Indus Valley about the Peshawar district, which was one of the principal seats of the Greek dominion. But in the Sanskrit writings the name Ionian appears in the form of Yona or Yavana, and Jona or Javana.[13]